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Fonts: stb_truetype loader: Reworked scale handling to suggest this is not required caching.

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ocornut 2025-01-20 20:01:21 +01:00
parent b203ac1e0d
commit c5653d5f34
1 changed files with 6 additions and 11 deletions
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17
imgui_draw.cpp
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@ -4151,19 +4151,14 @@ static bool ImGui_ImplStbTrueType_FontSrcInit(ImFontAtlas* atlas, ImFontConfig*
// FIXME-NEWFONTS: reevaluate sizing metrics
int oversample_h, oversample_v;
ImFontAtlasBuildGetOversampleFactors(src, &oversample_h, &oversample_v);
float scale;
if (src->SizePixels > 0.0f)
{
bd_font_data->ScaleForRasterX = stbtt_ScaleForPixelHeight(&bd_font_data->FontInfo, src->SizePixels * src->RasterizerDensity) * oversample_h;
bd_font_data->ScaleForRasterY = stbtt_ScaleForPixelHeight(&bd_font_data->FontInfo, src->SizePixels * src->RasterizerDensity) * oversample_v;
bd_font_data->ScaleForLayout = stbtt_ScaleForPixelHeight(&bd_font_data->FontInfo, src->SizePixels);
}
scale = stbtt_ScaleForPixelHeight(&bd_font_data->FontInfo, 1.0f);
else
{
bd_font_data->ScaleForRasterX = stbtt_ScaleForMappingEmToPixels(&bd_font_data->FontInfo, -src->SizePixels * src->RasterizerDensity) * oversample_h;
bd_font_data->ScaleForRasterY = stbtt_ScaleForMappingEmToPixels(&bd_font_data->FontInfo, -src->SizePixels * src->RasterizerDensity) * oversample_v;
bd_font_data->ScaleForLayout = stbtt_ScaleForMappingEmToPixels(&bd_font_data->FontInfo, -src->SizePixels);
}
scale = -stbtt_ScaleForMappingEmToPixels(&bd_font_data->FontInfo, 1.0f);
bd_font_data->ScaleForRasterX = scale * src->SizePixels * src->RasterizerDensity * oversample_h;
bd_font_data->ScaleForRasterY = scale * src->SizePixels * src->RasterizerDensity * oversample_v;
bd_font_data->ScaleForLayout = scale * src->SizePixels;
// FIXME-NEWFONTS: make use of line gap value
int unscaled_ascent, unscaled_descent, unscaled_line_gap;